Now showing items 730-749 of 890

  • Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation 

    Rosenheim, Brad E.; Swart, Peter K.; Thorrold, Simon R.; Eisenhauer, Anton; Willenz, Philippe (American Geophysical Union, 2005-01-21)
    Recent studies comparing shipboard data between the 1950's and the 1990's have shown significant, heterogeneous adjustments of the temperature-salinity structure of the N. Atlantic Ocean. Here, we present proxy records of ...
  • Sands and environmental conditions impact the abundance and persistence of the fecal indicator bacteria Enterococcus at recreational beaches 

    Halliday, Elizabeth (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-09)
    The marine fecal indicator Enterococcus is measured at beaches to detect fecal contamination events, and beaches are closed to bathers when Enterococcus is found to exceed the federally mandated limit. This dissertation ...
  • Sargasso Sea phosphorus biogeochemistry : an important role for dissolved organic phosphorus (DOP) 

    Lomas, Michael W.; Burke, A. L.; Lomas, D. A.; Bell, D. W.; Shen, C.; Dyhrman, Sonya T.; Ammerman, James W. (Copernicus Publications on behalf of the European Geosciences Union, 2010-02-19)
    Inorganic phosphorus (SRP) concentrations in the subtropical North Atlantic are some of the lowest in the global ocean and have been hypothesized to constrain primary production. Based upon data from several transect cruises ...
  • Saving endangered whales at no cost 

    Myers, Ransom A.; Boudreau, Stephanie A.; Kenney, Robert D.; Moore, Michael J.; Rosenberg, Andrew A.; Sherrill-Mix, Scott A.; Worm, Boris (2006)
    The North Atlantic right whale is one of the most critically endangered marine species. Drastic overexploitation has driven this large, slow-swimming baleen whale to virtual extinction in Europe, while a small remnant ...
  • Scale closure in upper ocean optical properties : from single particles to ocean color 

    Green, Rebecca E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2002-06)
    Predictions of chlorophyll concentration from satellite ocean color are an indicator of phytoplankton primary productivity, with implications for foodweb structure, fisheries, and the global carbon cycle. Current models ...
  • Sea-to-air fluxes from measurements of the atmospheric gradient of dimethylsulfide and comparison with simultaneous relaxed eddy accumulation measurements 

    Hintsa, Eric J.; Dacey, John W. H.; McGillis, Wade R.; Edson, James B.; Zappa, Christopher J.; Zemmelink, Hendrik J. (American Geophysical Union, 2004-01-30)
    We measured vertical profiles of dimethylsulfide (DMS) in the atmospheric marine boundary layer from R/P FLIP during the 2000 FAIRS cruise. Applying Monin-Obukhov similarity theory to the DMS gradients and simultaneous ...
  • Seamount sciences : quo vadis? 

    Staudigel, Hubert; Koppers, Anthony A. P.; Lavelle, J. William; Pitcher, Tony J.; Shank, Timothy M. (Oceanography Society, 2010-03)
    Seamounts are fascinating natural ocean laboratories that inform us about fundamental planetary and ocean processes, ocean ecology and fisheries, and hazards and metal resources. The more than 100,000 large seamounts are ...
  • Seamounts : deep-ocean laboratories of faunal connectivity, evolution, and endemism 

    Shank, Timothy M. (Oceanography Society, 2010-03)
    Seamount systems that are geographically, hydrographically, topographically, and/or genetically “isolated” are likely to have developed highly endemic taxa and ecosystems. Although current estimates of endemism are challenged ...
  • Seasonal dynamics of Mesodinium rubrum in Chesapeake Bay 

    Johnson, Matthew D.; Stoecker, Diane K.; Marshall, Harold G. (2013-03)
    The photosynthetic ciliate Mesodinium rubrum is a common member of coastal phytoplankton communities that is well adapted to low-light, turbid ecosystems. It supports the growth of or competes with harmful dinoflagellate ...
  • Seasonal occurrence of anoxygenic photosynthesis in Tillari and Selaulim reservoirs, Western India 

    Kurian, S.; Roy, Rajdeep; Repeta, Daniel J.; Gauns, M. U.; Shenoy, D. M.; Suresh, T.; Sarkar, A.; Narvenkar, G.; Johnson, Carl G.; Naqvi, S. W. A. (Copernicus Publications on behalf of the European Geosciences Union, 2012-07-09)
    Phytoplankton and bacterial pigment compositions were determined by high performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC-MS) in two freshwater reservoirs (Tillari Dam and Selaulim ...
  • Seasonal occurrence of balanomorph barnacle nauplius larvae in the region of the Antarctic Peninsula 

    Scheltema, Rudolf S.; Scheltema, Amelie H.; Williams, Isabelle P.; Halanych, Kenneth M. (2010-03-01)
    Plankton samples taken along the west coast of the Antarctic Peninsula and in Bransfield Strait show widespread occurrence of Bathylasma corolliforme nauplius larvae during the austral spring, mid-October to the third ...
  • A seasonal, density-dependent model for the management of an invasive weed 

    Shyu, Esther; Pardini, Eleanor A.; Knight, Tiffany M.; Caswell, Hal (Ecological Society of America, 2013-12)
    The population effects of harvest depend on complex interactions between density dependence, seasonality, stage structure, and management timing. Here we present a periodic nonlinear matrix population model that incorporates ...
  • Seawater reverse osmosis desalination and (harmful) algal blooms 

    Villacorte, Loreen O.; Alizadeh Tabatabai, S. Assiyeh; Anderson, Donald M.; Amy, Gary L.; Schippers, Jan C.; Kennedy, Maria D. (2015-01)
    This article reviews the occurrence of HABs in seawater, their effects on the operation of seawater reverse osmosis (SWRO) plants, the indicators for quantifying/predicting these effects, and the pretreatment strategies ...
  • Sedation at sea of entangled North Atlantic right whales (Eubalaena glacialis) to enhance disentanglement 

    Moore, Michael J.; Walsh, Michael; Bailey, James; Brunson, David; Gulland, Frances M.; Landry, Scott; Mattila, David K.; Mayo, Charles; Slay, Christopher K.; Smith, Jamison; Rowles, Teresa K. (Public Library of Science, 2010-03-09)
    The objective of this study was to enhance removal of fishing gear from right whales (Eubalaena glacialis) at sea that evade disentanglement boat approaches. Titrated intra muscular injections to achieve sedation were ...
  • Selective harvest of sooty shearwater chicks : effects on population dynamics and sustainability 

    Hunter, Christine M.; Caswell, Hal (2004-09-17)
    Selectivity of harvest influences harvest sustainability because individuals with different characteristics contribute differently to population growth. We investigate the effects of selection based on chick weight on a ...
  • Semi-automated image analysis for the identification of bivalve larvae from a Cape Cod estuary 

    Thompson, Christine M.; Hare, Matthew P.; Gallager, Scott M. (Association for the Sciences of Limnology and Oceanography, 2012-07)
    Machine-learning methods for identifying planktonic organisms are becoming well-established. Although similar morphologies among species make traditional image identification methods difficult for larval bivalves, ...
  • Sensitivity analysis of periodic matrix population models 

    Caswell, Hal; Shyu, Esther (2012-04)
    Periodic matrix models are frequently used to describe cyclic temporal variation (seasonal or interannual) and to account for the operation of multiple processes (e.g., demography and dispersal) within a single projection ...
  • Sensitivity analysis of reactive ecological dynamics 

    Verdy, Ariane; Caswell, Hal (2008-02)
    Ecological systems with asymptotically stable equilibria may exhibit significant transient dynamics following perturbations. In some cases, these transient dynamics include the possibility of excursions away from the ...
  • The sensory mediation of symbiosis between hyperiid amphipods and salps 

    Diebel, Carol E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-03)
    Hyperiid amphipods are open ocean crustaceans which use gelatinous planktonic animals for food, shelter, and brooding space for their offspring. These associations involve varying degrees of host specificity; and there ...
  • Sex bias in biopsy samples collected from free-ranging dolphins 

    Querouil, Sophie; Freitas, Luis; Dinis, Ana; Alves, Filipe; Cascao, Irma; Prieto, Rui; Silva, Monica A.; Magalhaes, Sara; Matos, Jose A.; Santos, Ricardo S. (2009-01-16)
    Biological samples of free-ranging dolphins are increasingly used to gain information on population structure and ecology. In small cetaceans, the gender of individuals usually cannot be determined at sea, and population ...